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Ann: Meteoric Forging Ahead on Multiple Fronts, page-23

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03/07/21

14:54

Post #: 54259253
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Originally posted by Maccajohn: ↑

I found information about the % of Cu is various minerals (https://marketcap.com.au/economic-significance-copper-minerals-reference-asxmod/). This is an extract with the chemical formula and Copper % of the minerals that MEI noted in its ASX release on 24 June:

Chalcocite - Cu₂S, 79.9%
Covellite - CuS, 66.5%
Bornite - Cu₅FeS₄, 63.3%
Chalcopyrite - CuFeS₂, 34.6%

In the announcement (https://wcsecure.weblink.com.au/pdf/MEI/02387534.pdf) on page 4 they found about 50m of Bornite and around 200m of Chalcopyrite and with the % of each mineral, one can use the above information to work out what the grades of Cu that may be in the hole (I don't understand how they can possibly work out the % of each mineral from the cores).

For example, between about 210m and 225m they show Bornite was about 0.75% which results in 0.475% of Cu. To that add Chalcopyrite of 1% giving 0.82% Cu (ie 0.475 + 0.346) over this interval. They also found some Covellite at 220m (see photo 2) which would increase the % Cu a bit.

Between 187m and 240m they have close to 1% Chalcopyrite for most of the interval or about 0.3% to 0.35% Cu over about 50m (this zone contains a lot of Molybdenum as well, at least 2%).

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would love a response to the above by someone in the know.

MEI Price at posting: 5.5¢ Sentiment: Hold Disclosure: Held
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